This poll covered attitudes towards Heathrow among residents in 12 constituencies local to the airport. Populus interviewed at least 833 adult residents (18+) in 12 constituencies local to Heathrow Airport by telephone between 1 July and 3 August 2016. In total, 10,010 residents were interviewed. Results were weighted to be demographically representative of all adults in each constituency, and were also weighted by past vote to be politically representative of all adults.